Perpetual calendar.



J. J. OBRIEN.

PERPETUAL CALENDAR;

APPLICATION FILED JUNE 20, 191i. I 1,029,455, Patented June 11, 1912.

2 SHEETS-SHEET 1.

WITNESSES 4 IIVVENTOR C5! 44 f ha I what/05716 By W W v ATTORNEYS coLunuuA PLANOIIRM'H LIOWWASHINUTON, IL c.

J. J. OBRIEN.

PERPETUAL CALENDAR.

APPLICATION FILED JUNE 20, 1911.

Patented June 11, 1912.

2 SHEETSSHEET 2.

WIT M58858 IIVVENTOR A770RIVEY8 UNITED STATES PATENT OFFICE;

JOHN JAMES OBRIEN, or NEW YORK, N. Y., ASSIGNOR or ONE-HALF T0 IsAAo A. ROSE,

OF NEW YORK, N. Y.

PERPETUAL CALENDAR.

Specification of Letters Patent.

Patented June 11, 1912.

To all whom it may concern:

Be it known that I, J OHN J. OBRIEN, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the count-y and State of New York, have invented a new and Improved Perpetual Calendar, of which the following is a full, clear, and .exact description.

The object of the invention is to provide a new and improved perpetual calendar, arranged to disclose the name of the month,

the names of the week days and the days of the month, to permit convenient setting at the end of each month, for correctly displaying the days for the next month, and to indicate the past days of the month and the present day of the week or month.

For the purpose mentioned, use is made of a movable web provided with numerals for indicating the days of each month, the web being also provided with the name of each month, each name being arranged in conjunction with the corresponding numerals, a fixed front bearing the names of the week and in register with the correspondingset of numerals, the said fixed front having a slot in register with and adapted to display the name of the present month. Use is also made of a second web movable across the numerals of the said first-named web and provided with means to indicate the past days of the month.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification,in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the perpetual calendar; Fig. 2 is an enlarged rear elevation of the same; Fig. 8 is a sectional plan view of the same on the line 33 of Fig. 2; Fig. A is a cross section of the same on the line H of Fig. 2; Fig. 5 is an enlarged perspective view of the lower portion of a roller shaft; Fig. 6 is a perspective view of the knob for turning the roller in one direction only; Fig. 7 is a similar view of the spring pawl for use in connection with the said knob and the lower end of the roller shaft; Fig. 8 is a face view of part of the web bearing the sets of names for each month and the sets of numerals for each month; Fig. 9 is a reduced face view of the web for indicating the past days of the month; and Fig. lOis a like view of a modified form of the same.

A suit-ably constructed" housing or a casing A is provided with a front A, in its dlsplay opening A and on the ,rear face of the front A is arranged a plate B, of glass or other suitable material, and extending over the display opening A To the rear portion of the plate B is secured a strip C, of paper or other material, and provided on the front face with the names D ofthe week 1n regular order, as plainly indicated in Fig. 1. The strip C leaves a clear space above it and below, the space above being for the display of the name of the present month, and the space below being for the display of the days of the present month, as hereinafter more fully explained. Within the housing A are journaled rollers F, F on which winds and unwinds a web G also passing over guide rollers H, H journaled in the housing A, and serving to guide the web G across the display opening A in the rear of the strip C and the glass plate B. On the web G are arranged sets of numerals I indicating the days of the month, and appearing in the space below the strip C, and on the sheet are also arranged names J of each month, as will be readily understood by reference to Figs. 1 and 8. The vertical columns of the numerals I are adapted to register with the names D of the week, as will be readily understood by reference to Fig. 1, and one of the names J of the month appears in the space above the strip C, it being understood that by the arrangement described the calendar can be set for each month of each year. When a month has passed then the user turns the roller F to cause the web G to travel-in the direction of the arrow a, as shown in Fig. 3, with a view to set the web G for the next month, it being understood that the web is shifted so as to bring the corresponding vertical columns of the numerals I in proper register with the names D of the week and to display the numerals I below the strip 0.

In the housing A and near the sides 7,

thereof are ournaled rollers K, K, on which Winds and unwinds a web L, preferably made of a transparent or translucent material such as tracing paper or tracing cloth, the web L having cut-out portions L arranged in step form in accordance with the horizontal rows of numerals I on the web G. The web L passes in front of the lower portion of the web G, that is, the portion having the numerals I, so that the cut-out portions L register with the horizontal rows of numerals I. Now, on the operator turning the roller F, the web L is caused to travel in the direction of the arrow at, so that the web somewhat covers up the numerals of the past days of the month, at the same time leaving the present day and the following days of the month unobliterated, that is, in full view, whereby the user can see at a glance the present day of the month, as will be readily understood by reference to Fig. 1, which shows Tuesday, May 16th, as the day for which the calendar has been set.

By making the web L of transparent or translucent material, the past days of the month are still sufiiciently visible for the user of the calendar to make ready reference to such past days without shifting the web L.

Instead of providing the web L with cutout portions, a web L may be used, of a similar material, but provided on its face with heavy lines L arranged at their righthand ends in step form, so that when the web L is moved across the numerals I then the lines L appear as crossing out such numerals, which represent past days of the month, the lines appearing across the numerals in a longitudinal direction.

The rollers F and F and K, K are pressed on top and bottom by springs N, N, held in the housing A, so as to allow a slight up and down yielding of the roller, to keep the webs G and L at all times in properly stretched position. The shafts F, K of the rollers F, F and K, K are provided at their lower ends with means for turning the corresponding rollers, and as said means are alike in construction, it suffices to describe but one in detail, special reference being had to Figs. 5, 6 and 7.

On the shaft is secured a collar 0, provided with a slot 0 engaged by the upturned end P of a spring pawl P, having its other end P adapted to engage ratchet teeth Q formed on a knob Q mounted to turn loosely on the lower end of the corresponding shaft F or K The ratchet teeth Q and the pawls Q are so arranged for the rollers F and F that the said rollers can be turned in opposite directions only on the operator turning the corresponding knob Q, and in a similar manner the ratchet teeth Q and the pawls P for the rollers K, K are arranged to allow of turningthe said rollers in opposite directions only on the operator turning the knob Q. Thus the operator or user of the perpetual calendar is not liable to turn any one of the rollers in the wrong direction; that is, for moving the web G in the direction of the arrow at the operator turns the knob Q of the roller F, and for moving the web G in the inverse direction of the arrow a at the end of the year, the operator turns the roller F. Likewise for advancing the web L in the direction of the arrow a, the operator turns the knob Q of the roller K at each day, to advance the said web correspondingly on the numerals I, and at the end of the month the operator turns the knob Q for the roller K, so as to return the web L to starting position. i

From the foregoing it will be seen that by the arrangement described, the user of the perpetual calendar can conveniently set the web L at the beginning of each day, so as to permanently disclose the same, and partly covering the past days of the month, and at the end of each month the operator readily adjusts the web G, so as to set the I same according to the days of the month and relative to the names D of the week days. At the end of the year the web G is returned to starting position by turning the roller F correspondingly, and then the above described operation is repeated, that is, the web G is adjusted for each month while the web L is adjusted at each day.

Having thus described my invention, I claim as new and desire .to secure by Letters Patent:

1. A perpetual calendar, comprising a fixed front bearing the names of the days of the week, a movable web behind the said front and extending below the same, the web being provided with numerals for indicating the days of each month and in register with the said names of the days of the week, the said web being provided with the names of the months of the year, each name being arranged to indicate the numerals for the corresponding month, and

a second single web operating over the'firstnamed web and provided with means whereby to move continuously and indicate the past days of the month.

2. A perpetual calendar, comprising a fixed front bearing the names of the days of the week, and amovable web behind the said front and extending below the same, the web being provided with numerals for indicating the days of each month and in register with the said names of. the days of the week, the said web being provided with the names of the months of the year, each name being arranged to indicate for the numerals for the corresponding month, name to this specification in the presence of and a second Web of transparent material two subscribing Witnesses. movable over the said first-named Web and 7 having cut-out portions arranged in step JOHN JAMES OBRIEN' form to indicate all the past days of the Witnesses: month. LOUIS O. ANTON,

In testimony whereof I have signed my PERCY BALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

